After applying the recent security patch and updating MPlayer, the videos may not be converting to flv and videos may not be playing if your youtube clone script uses mencoder to convert them to flv. I noticed that one vendor’s script uses this phrase

-lavfopts i_certify_that_my_video_stream_does_not_use_b_frames

which needs to be changed to this

-ofps 12

Those who are using ffmpeg for conversion need not worry.

Side Note: I don’t know the details as I did not have much time to look into it but ffmpeg converted a 90MB wmv file into 240MB file. But using mencoder I got 95MB flv file. Cool